Why is Good Friday called 'good'?

Does it seem ironic that one of the most tragic days in Christian history is called Good Friday? The New Testament describes a day of suffering that ends in Jesus’ crucifixion, events that sound like anything but good.
In this quick video from The United Methodist Church, learn the 3rd century history behind the phrase, as well as how remembering this day moves us to the hope of Easter.

[ChristinaChrisR]

Not important, and I’m not even a Christian, but for info in Sweden we don’t call it Holy Friday. We call it Long Friday. 80, 90, and 100 years ago in Sweden it was a very sad day, a day in solitude, without friends, without working, basically only mourning. At service on this day it’s still very serious, solemn, in the churches, and the bells don’t ring.

[OnlineMinistryFairfieldFUMC]

I don't understand the claim that "Since the 3rd century the English and the Dutch have used the term 'Good Friday'..." - since there WERE no "English" or "Dutch" in the 3rd century.